CVE-2020-9758

CRITICAL

LiveZilla < 8.0.1.3 - Unauthenticated Stored Cross-Site Scripting via Name Parameter

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2020-9758. PoCs published by ari034.

AI-analyzed exploit summary This repository provides a detailed technical analysis of CVE-2020-9758, a blind JavaScript injection vulnerability in LiveZilla Live Chat 8.0.1.3. The vulnerability allows unauthenticated attackers to perform stored XSS via the 'name' parameter, leading to credential leakage and privilege escalation.

Description

An issue was discovered in chat.php in LiveZilla Live Chat 8.0.1.3 (Helpdesk). A blind JavaScript injection lies in the name parameter. Triggering this can fetch the username and passwords of the helpdesk employees in the URI. This leads to a privilege escalation, from unauthenticated to user-level access, leading to full account takeover. The attack fetches multiple credentials because they are stored in the database (stored XSS). This affects the mobile/chat URI via the lgn and psswrd parameters.

Exploits (1)

nomisec WRITEUP 3 stars
by ari034 · poc
https://github.com/ari034/CVE-2020-9758

This repository provides a detailed technical analysis of CVE-2020-9758, a blind JavaScript injection vulnerability in LiveZilla Live Chat 8.0.1.3. The vulnerability allows unauthenticated attackers to perform stored XSS via the 'name' parameter, leading to credential leakage and privilege escalation.

Classification
Writeup 90%
Attack Type
Xss
Complexity
Moderate
Reliability
Reliable
Target: LiveZilla Live Chat 8.0.1.3
No auth needed
Prerequisites: Access to the vulnerable LiveZilla instance
MITRE ATT&CK
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (1)

Core 1
Core References
Third Party Advisory x_refsource_misc
https://github.com/ari034/CVE-2020-9758

Scores

CVSS v3 9.6
EPSS 0.0246
EPSS Percentile 82.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Details

CWE
CWE-79
Status published
Products (1)
livezilla/livezilla < 8.0.1.3
Published Mar 09, 2020
Tracked Since Feb 18, 2026